🛠️ Repo: Add "this was included in" comments to issues and PRs upon release

[JoshuaKGoldberg]

Tooling Suggestion Checklist

• I have tried restarting my IDE and the issue persists.
• I have pulled the latest main branch of the repository.
• I have read and agree to Mocha's Code of Conduct and Contributing Guidelines
• I have searched for related issues and issues with the faq label, but none matched my issue.
• I want to provide a PR to resolve this

Overview

When an issue is resolved in a new, it'd be nice to note in the issue itself that folks can get the updated code in that release. Right now there's no direct way to go from an issue to the specific release that included it.

Proposal: let's add to the automated release flow to do this?

Additional Info

For example, with #3893 -> #4989, @73rhodes did a very nice thing of manually commenting #3893 (comment) and other comments.

I've seen this in other repos with release-it and other automations. Example: JoshuaKGoldberg/create-typescript-app#2219 (comment). I haven't looked into how to do it in release-please.

[voxpelli]

I looked into this a while back and filed this as that felt like the most reasonable way forward: release-it/release-it#1126